[Nek5000-users] Problem with the number of itterations

[nek5000-users at lists.mcs.anl.gov]

Your problem has very low viscosity, so there will be very few velocity
iterations.

I would suggest turning off the filter if it's not helping -- but most
likely
there is another issue (e.g., perhaps needing more resolution for the
target Reynolds
number).

For a wing, it might not be a bad idea to first run a 2D airfoil at the
target conditions
just to get an idea of the meshing requirements for the target Re.

hth,

Paul


On Tue, Dec 4, 2018 at 6:21 AM nek5000-users--- via Nek5000-users <
nek5000-users at lists.mcs.anl.gov> wrote:

>
> Hi, Neks!
> I am working with a complex geometry which was built in gambit. I have
> some questions.
> 1) When I start Nek5000, I have only 1 itteration for velx, vely,velz, but
> for the preassure field itterations >30. How can it be possible?
> 2) When I set p103=0.1 in .rea file, Courant number increases and becomes
> >1 very fast. How does the filtration effect on the Courant number?
> I attached my .rea file and  logfile.
> https://drive.google.com/open?id=1YEV2f5Mllqenhu-rk39YJ84_1XHYjC_H
>
>
> *https://drive.google.com/open?id=1jRKI_zEnb78cR7uXFi3mE0txk6FN3EXQ
> <https://drive.google.com/open?id=1jRKI_zEnb78cR7uXFi3mE0txk6FN3EXQ> *
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